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Tanohataite

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About TanohataiteHide

Formula:
LiMn2(HSi3O9)
Colour:
Pinkish-white
Lustre:
Vitreous, Silky
Hardness:
5 - 5½
Specific Gravity:
3.33 (Calculated)
Crystal System:
Triclinic
Name:
Named for the type locality.
Isostructural with:
The Li analogue of sérandite.


Classification of TanohataiteHide

Approved
Approval Year:
2007

Physical Properties of TanohataiteHide

Vitreous, Silky
Transparency:
Transparent
Colour:
Pinkish-white
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Cleavage:
Perfect
on {001} and {100}.
Density:
3.33 g/cm3 (Calculated)

Optical Data of TanohataiteHide

Type:
Biaxial (-)
RI values:
nα = 1.593(3) nβ = 1.618(3) nγ = 1.653(3)
2V:
Calculated: 82°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of TanohataiteHide

Formula:
LiMn2(HSi3O9)
IMA Formula:
LiMn2Si3O8(OH)

Crystallography of TanohataiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.612 Å, b = 7.038 Å, c = 6.700 Å
α = 90.23°, β = 94.70°, γ = 105.26°
Ratio:
a:b:c = 1.082 : 1 : 0.952
Unit Cell V:
345 ų
Z:
2
Morphology:
In aggregates of fibrous crystals

Type Occurrence of TanohataiteHide

General Appearance of Type Material:
Aggregates of fibrous crystals in veinlets
Geological Setting of Type Material:
metasedimentary
Associated Minerals at Type Locality:

Synonyms of TanohataiteHide

Other Language Names for TanohataiteHide

Japanese:田野畑石

Relationship of Tanohataite to other SpeciesHide

Other Members of this group:
Barrydawsonite-(Y)Na1.5Y0.5CaSi3O9HMon. 2/m : P21/b
BustamiteCaMn2+(Si2O6)Tric. 1 : P1
CascanditeCa(Sc,Fe3+)(HSi3O9)Tric. 1
FerrobustamiteCaFe2+(Si2O6)Tric.
MurakamiiteCa2LiSi3O8(OH)Tric. 1 : P1
PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
VistepiteSnMn4B2Si4O16(OH)2Tric. 1
WollastoniteCaSiO3Tric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for TanohataiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nagase, Toshiro; Hori, Hidemichi; Kitamine, Mizuya; Nagashima, Mariko; Abduriyim, Ahmadjan; Kuribayashi, Takahiro (2012): Tanohataite, LiMn2Si3O8(OH): a new mineral from the Tanohata mine, Iwate Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 107, 149-154.

Internet Links for TanohataiteHide

Localities for TanohataiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan (TL)
 
  • Honshu Island
    • Tohoku Region
      • Iwate Prefecture
        • Shimohei-gun
          • Tanohata-mura
            • Tanohata mine
Nagase, Toshiro; Hori, Hidemichi; Kitamine, Mizuya; Nagashima, Mariko; Abduriyim, Ahmadjan; Kuribayashi, Takahiro (2012): Tanohataite, LiMn2Si3O8(OH): a new mineral from the Tanohata mine, Iwate Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 107, 149-154.
Mineral and/or Locality  
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